// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion Stream<String> bind(Stream<Object> stream)
/// Transform the incoming stream's events.
/// Creates a new stream. When this stream is listened to, it will start
/// listening on stream, and generate events on the new stream based on the
/// events from stream.
///
/// Subscriptions on the returned stream should propagate pause state to the
/// subscription on stream.
/// @description Checks that this method transforms stream's events
/// @author sgrekhov@unipro.ru

import "dart:convert";
import "dart:async";
import "../../../Utils/expect.dart";

Future check(Object data) async {
  JsonEncoder encoder = new JsonEncoder();
  StringBuffer sb = new StringBuffer();
  await for (Object event in encoder.bind(new Stream.fromIterable([data]))) {
    sb.write(event);
  }
  Expect.deepEquals(encoder.convert(data), sb.toString());
}

main() {
  asyncStart();
  Future.wait([
    check(1),
    check(3.14),
    check(null),
    check(true),
    check(false),
    check('"str"'),
    check(["1", "2", "3.14"]),
    check([[1, 2, 3], {"a": "3"}]),
    check({"a": "b"}),
    check({"й": " ф "})
  ]).then(
      (_) => asyncEnd()
  );
}